import Env
import SwiftUI

extension IceCubesApp {
  var tabBarView: some View {
    TabView(selection: .init(get: {
      selectedTab
    }, set: { newTab in
      if newTab == selectedTab {
        /// Stupid hack to trigger onChange binding in tab views.
        popToRootTab = .other
        DispatchQueue.main.asyncAfter(deadline: .now() + 0.01) {
          popToRootTab = selectedTab
        }
      }

      HapticManager.shared.fireHaptic(.tabSelection)
      SoundEffectManager.shared.playSound(.tabSelection)

      selectedTab = newTab
    })) {
      ForEach(availableTabs) { tab in
        tab.makeContentView(selectedTab: $selectedTab, popToRootTab: $popToRootTab)
          .tabItem {
            if userPreferences.showiPhoneTabLabel {
              tab.label
            } else {
              Image(systemName: tab.iconName)
            }
          }
          .tag(tab)
          .badge(badgeFor(tab: tab))
          .toolbarBackground(theme.primaryBackgroundColor.opacity(0.50), for: .tabBar)
      }
    }
    .id(appAccountsManager.currentClient.id)
  }

  private func badgeFor(tab: Tab) -> Int {
    if tab == .notifications, selectedTab != tab,
       let token = appAccountsManager.currentAccount.oauthToken
    {
      return watcher.unreadNotificationsCount + (userPreferences.notificationsCount[token] ?? 0)
    }
    return 0
  }
}